Natality Data

Introduction

The Natality.csv contains information of Natality in each state. This includes the baby’s gender, birth weight, mother’s age and total number of births. The Census2015.cvs file contains the median age of the total population in each state.

R Configuration

Below is our sessionInfo().

sessionInfo(package=NULL)

ETL Script

source("../01 Data/ETL.R")

require(readr)
require(plyr)

file_path = "../01 Data/Natality.csv"
natality <- readr::read_csv(file_path)
names(natality)

df <- natality

names(df)
str(df) # Uncomment this line and  run just the lines to here to get column types to use for getting the list of measures.

measures <- c("State_Code","Births","Average_Birth_Weight","Average_Age_Mother")

dimensions <- setdiff(names(df), measures)
dimensions

# Get rid of special characters in each column.
# Google ASCII Table to understand the following:
for(n in names(df)) {
  df[n] <- data.frame(lapply(df[n], gsub, pattern="[^ -~]",replacement= ""))
}
str(df)

na2emptyString <- function (x) {
  x[is.na(x)] <- ""
  return(x)
}

if( length(dimensions) > 0) {
  for(d in dimensions) {
    # Change NA to the empty string.
    df[d] <- data.frame(lapply(df[d], na2emptyString))
    # Get rid of " and ' in dimensions.
    df[d] <- data.frame(lapply(df[d], gsub, pattern="[\"']",replacement= ""))
    # Change & to and in dimensions.
    df[d] <- data.frame(lapply(df[d], gsub, pattern="&",replacement= " and "))
    # Change : to ; in dimensions.
    df[d] <- data.frame(lapply(df[d], gsub, pattern=":",replacement= ";"))
  }
}

na2zero <- function (x) {
  x[is.na(x)] <- 0
  return(x)
}
# Get rid of all characters in measures except for numbers, the - sign, and period.dimensions, and change NA to 0.
if( length(measures) > 1) {
  for(m in measures) {
    print(m)
    df[m] <- data.frame(lapply(df[m], gsub, pattern="[^--.0-9]",replacement= ""))
    df[m] <- data.frame(lapply(df[m], na2zero))
    df[m] <- lapply(df[m], function(x) as.numeric(as.character(x)))
    #df[m] <- data.frame(lapply(df[m], as.numeric(as.character))) # This is needed to turn measures back to numeric because gsub turns them into strings.
  }
}

str(df)

write.csv(df, gsub("Natality", "Natality", file_path), row.names=FALSE, na = "")

tableName <- gsub(" +", "_", gsub("[^A-z, 0-9, ]", "", gsub(".csv", "", file_path)))
sql <- paste("CREATE TABLE", tableName, "(\n Natality \n")
if( length(measures) > 0 || ! is.na(dimensions)) {
  for(d in dimensions) {
    sql <- paste(sql, paste(d, "varchar2(4000),\n"))
  }
}
if( length(measures) > 0 || ! is.na(measures)) {
  for(m in measures) {
    if(m != tail(measures, n=1)) sql <- paste(sql, paste(m, "number(38,4),\n"))
    else sql <- paste(sql, paste(m, "number(38,4)\n"))
  }
}
sql <- paste(sql, ");")
cat(sql)

The Cleaned up data

The cleaned up data file, Natality.csv, is on conneyc’s account under dataset S17 DV Project 5. The TAs have been added as contributors and can download the file from the link provided below.

https://data.world/conneyc/s-17-dv-project-5

The Census Data

The data file containing the census data we are using, Census2015.csv, is on conneyc’s account under dataset S17 DV Project 5. The TAs have been added as contributors and can download the file from the link provided below.

https://data.world/conneyc/s-17-dv-project-5

Visualizations

Boxplots

This visualization is a boxplot of state vs births. It is filtered by Race and Births and has the detail of the gender of the births. It is observed that California has the largest number of births for female and males followed by Texas.

This is the same data visualization done in Shiny.

---

Histograms

This Treemap displays the count of the average age of mothers for each age in 0.5 bins, by race. It is colored by the count, with the race and average age as text. When the mouse is hovered over a box, it tells you the count number. For Asians, it is seen that most mothers are 30.5 years old, white mothers are 28, African Americas are 26, and Natives are 26.5. Asian mothers have babies the latest while African Americans have them the earliest.

Natives
Asian/Pacific Islanders
African Americans

White These Shiny histograms show the same result as the Tableau treemap, with the addition of a vertical average line for the average average-median-age for each race. The average line is close to the highest bar for each race except African American, where the average line is about a year later than the most common average-median-age.

---

Scatterplots

This scatterplot compares the median age and number of births of each state. Each point signifies the median age of the state and number of births of each gender for a specific race within that state. The shape of the points classify the race and the color classifies the state. A trend line was added which shows Births = -682.411*Median_Age + 35676.1, meaning as the median age of the state increases, there appears to be a decrease in the number of births.

This is the same visualization done in Shiny.

---

Crosstabs

This graph shows average birth weight per state by race. It is colored by the calculated field (KPI): AVG(average birth weight)/4000. The number 4000 is an average healthy birth weight in the US. The data reflects that white babies tend to weigh more than the other races.

This is the same visualization done in Shiny.

---

This graph was created by joining Natality.csv with Census2015.csv through State= AreaName. It shows the total number of births for each race per state using the data from Natality.csv. The number of births for corresponding states is colored by the Median_Age column from Census2015.csv using parameters. The parameters are low: 0-34.7, medium: 34.7-39.3, and high: 39.3+. Regardless of median age, Whites have the largest number of births followed by Black or African, Asian or Pacific Islander then American Indian or Alaska Native. However, this trend is most likely a reflection of the existing demographic where the majority of the population is White. Texas is a low Median age state and has a high number of births.

This is the same visualization done in Shiny.

---

Barcharts

This graph shows average birth weight (in grams) for each race in each state. There is a reference line that is the average birth weight for the state, and the calculated difference from average is applied. The calculated difference is the average birth weight (for that race in that state) minus the total average birth weight of all the states. It is used for color of the bars and text and displayed by the mark labels. Numbers are shown when the mouse is hovered over each bar. The data reflects that White babies and American Indian/Alaskan babies tend to weigh more than the average baby for each state.

This is the Shiny version. The states chosen are states in the deep south, and the trend of White and Native babies weighing more continues for these states. The average line shows the average birth weight for the state, and the calculated difference is the difference between the average birth weight in the state and the average birth weight for the specific race in the state.

---

This graph used data from Census2015 (Median Age) and Natality (Births, Race) joined by State. It shows the sum of births in High Median Age States, which is a set of states which an average median age greater than 40. Each bar color is broken down by the number of births contributed by each race within that state. Average Median Age is put into detail. Maine has the highest median age. All these states have the largest number of births that are White, followed by Black, Asian and Native. Of these high median age states, Florida has the largest number of births.

The Shiny version is the same for this visualization.

---

Shiny Application

Our visualizations are published in an application on our accounts:

https://kellyjennings.shinyapps.io/finalproject/

https://conneyc.shinyapps.io/finalproject/

https://cliu42.shinyapps.io/finalproject/